Scintillation properties of Eu2+-doped KBa2I5 and K2BaI4

Stand, L.; Zhuravleva, M.; Chakoumakos, Bryan C.; Johnson, J.; Lindsey, Adam; Melcher, Charles L.

doi:10.1016/j.jlumin.2015.09.013

Title: Scintillation properties of Eu²⁺-doped KBa₂I₅ and K₂BaI₄

Journal Article · Fri Sep 25 00:00:00 EDT 2015 · Journal of Luminescence

DOI:https://doi.org/10.1016/j.jlumin.2015.09.013· OSTI ID:1286894

Stand, L. ^[1]; Zhuravleva, M. ^[2]; Chakoumakos, Bryan C. ^[3]; Johnson, J. ^[1]; Lindsey, Adam ^[1]; Melcher, Charles L. ^[2]

Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center
Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We report two new ternary metal halide scintillators, KBa₂I₅ and K₂BaI₄, activated with divalent europium. Single crystal X-ray diffraction measurements confirmed that KBa₂I₅ has a monoclinic structure (P2₁/c) and that K₂BaI₄ has a rhombohedral structure (R3c). Differential scanning calorimetry showed singular melting and crystallization points, making these compounds viable candidates for melt growth. We grew 13 mm diameter single crystals of KBa₂I₅:Eu²⁺ and K₂BaI₄:Eu2+ in evacuated quartz ampoules via the vertical Bridgman technique. The optimal Eu²⁺ concentration was 4% for KBa₂I₅ and 7% for K₂BaI₄. The X-ray excited emissions at 444 nm for KBa₂I₅:Eu 4% and 448 nm for K₂BaI₄:Eu 7% arise from the 5d-4f radiative transition in Eu²⁺. KBa₂I₅:Eu 4% has a light yield of 90,000 photons/MeV, with an energy resolution of 2.4% and K₂BaI₄:Eu 7% has a light yield of 63,000 ph/MeV, with an energy resolution of 2.9% at 662 keV. Both crystals have an excellent proportional response to a wide range of gamma-ray energies.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1286894

Alternate ID(s):: OSTI ID: 1396526

Journal Information:: Journal of Luminescence, Vol. 169; ISSN 0022-2313

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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Cited By (2)

Inorganic, Organic, and Perovskite Halides with Nanotechnology for High–Light Yield X- and γ-ray Scintillators Maddalena, Francesco; Tjahjana, Liliana; Xie, Aozhen Crystals, Vol. 9, Issue 2 https://doi.org/10.3390/cryst9020088	journal	February 2019
Data-enabled structure–property mappings for lanthanide-activated inorganic scintillators Pilania, G.; Liu, Xiang-Yang; Wang, Zhehui Journal of Materials Science, Vol. 54, Issue 11 https://doi.org/10.1007/s10853-019-03434-7	journal	February 2019

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Title: Scintillation properties of Eu2+-doped KBa2I5 and K2BaI4

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Title: Scintillation properties of Eu²⁺-doped KBa₂I₅ and K₂BaI₄